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I’m less excited about the Koffie Straw for the purpose it was invented, to protect teeth from stains and enamel erosion. Although a great solution to a problem it simultaneously solves one of our biggest pet peeves. Splashy cups. Invevitably our morning cup of coffee jets jostled around on a our commute to a point of spillage from that little oval hole in the lid. The Koffie Straw has an oval design to fit snugly in the lid. Gravity will help sedate the splash as it attempts to travel up and out the spout but it’s denied every time. Small compact and reusable, we’ll have one of these in every jacket we own.